Dendritic needle network modeling of the Columnar-to-Equiaxed Transition. Part II: three dimensional formulation, implementation and comparison with experiments

Abstract

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Very fast simulation of growth competition between columnar dendritic grains during melt pool solidification

“…This physically-based multiscale model has been used to simulate dendritic growth during solidification, and was in good agreement with PF simulations while being significantly faster. In addition, the columnar grain growth and CET have also been determined in 2D [11] and in 3D [12].…”

Parameter calculation and result storage for phase-field simulation in α-Mg dendrite growth of Mg-5-wt% Zn alloy

“…[1] Dendrite, as a typical solidification microstructure, exists in most metallic alloys. [2,3] Understanding the evolution of dendrite morphologies and segregation distribution is important in controlling final microstructures. With the development of computer science and material thermodynamics, the phase-field method has become an indispensable means to simulate the evolution of microstructures, especially dendrites.…”

Concurrent model for sharp and progressive columnar to equiaxed transitions validated by directional solidification experiments processed in microgravity conditions

“…Principal amongst these tools are Cellular Automata (CA) [9], Phase Field (PF) [10], and Front Tracking (FT) [11][12][13], as summarized in [14]. An approach known as Dendritic Needle Network (DNN) [15] has also been applied to CET [16,17]. These models operate across different length and time scales to cover the corresponding physics -greater physical complexity brings increased computational effort and simulation time.…”